Cotangens - examples

  1. How far
    lighthouse_1 From the top of a lighthouse 145 ft above sea level, the angle of depression of a boat 29°. How far is the boat from the lighthouse?
  2. Building
    Taipei_101 How high is the building that throws horizontal shadow 58.5 m long at angle 36°36'?
  3. Regular 5-gon
    5gon_2 Calculate area of the regular pentagon with side 11 cm.
  4. Aircraft
    aircraft The plane flies at altitude 6800 m. At the time of first measurement was to see the elevation angle of 20° and second measurement of the elevation angle of 34°. Calculate the distance the plane flew between the two measurements.
  5. Q-Exam
    unit_circle If tg α = 3.8, Calculating sin α, cos α, cotg α .
  6. Angle
    atan A straight line p given by the equation ?. Calculate the size of angle in degrees between line p and y-axis.

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